JP2981643B2 - Method for producing conductive thin material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a conductive thin material mainly represented by a contact provided in a surface mount connector and having a partially different thickness.

[0002]

2. Description of the Related Art Conventionally, as a contact for a connector, which is a representative of this kind of conductive thin material, for example, FIG.
FIG. 12B is a plan view thereof, and FIG. 12B is a side view thereof. This contact is composed of a contact terminal portion 1 fitted into a mating contact provided in the mating connector and a press contact terminal portion 2 incorporated in an insulator of the required connector and connected to the mating conductive connection portion. The structure is formed. Here, the thickness of the contact terminal portion 1 is a base material thickness t, and the thickness of the press contact terminal portion 2 is a crushed thickness t ′ smaller than the base material thickness t.

In general, when manufacturing such a contact body for bidirectional connection, in order to secure elasticity and mechanical strength, a thick conductive material is coined (coined) and partially thinned. Or forming is performed using a conductive deformed material having a partially different thickness in the base material itself.

[0004] When the contact body is manufactured by the former method, a conductive flat material is used as a base material. However, in the first preliminary punching, the crushing pressure due to the next crushing is reduced, and adjacent members do not come into contact with each other. As shown in FIG.
Performing punching by a preliminary step for punching tools 3 by setting the predetermined blank width W _B as shown in (a). Incidentally, the thickness of the portion to be processed at this time is maintained at the base material thickness t as shown in FIG.

[0005] In the next crushing process, the pressure-processed portion which is a local portion of the processed portion is crushed and deformed as shown in FIG. 14 (a), and the pressure-processed portion is deformed as shown in FIG. 14 (b). Is formed so as to have a crushed thickness t ′ of a desired thickness (usually about half of the base material thickness t).

Subsequently, in the blanking process, FIG.
As shown in FIG. 15A, a punching process is performed using a punching tool 3 ′ for forming stage to remove an excessively deformed portion of the pressure-processed portion to obtain a desired shape. As a result, FIG.
As shown in (b), it is formed to have a crushed thickness t 'and a base material thickness t assuming that the deformed portion has been removed.

That is, if coining is performed in this manner, a flat material having a base material thickness t as shown in FIG.
As shown in FIG. 6B, the contact body 10 including the crushed thickness t 'without the reduced portion N' is obtained. The dimensions of each part are, for example, t = 0.4 mm, t ′ = 0.
3 mm.

[0008] On the other hand, in the case of the latter, the base material shown in FIG.
Forming using a conductive deformed material previously formed by roll or cutting with a material width W as shown in FIG. 17A results in a material width W as shown in FIG.
To form a crushed thickness t 'and a base material thickness t. Thereby, the same shape as the contact body 10 described above is obtained.

Further, as another method of manufacturing such a contact body 10, there is a case where a flat plate having a thickness of a thin plate portion is used in combination and pressed. In this method, using a conductive flat plate having the thickness of the thin plate portion, the thin plate is widely pulled out in a volume required for the thick plate portion, and further, these are bent at a right angle to utilize the vertical movement which is a basic operation of press working. By crushing them from above and below to increase the thickness to a predetermined thickness, the same shape as the contact body 10 described above can be obtained.

[0010]

In the case of the above-described method of manufacturing a conductive thin material represented by a contact body, a method of coining a thick conductive material to partially form a thin portion is described as follows. Preliminary blanking, crushing, and forming blanking are required, and the manufacturing process takes too much time, resulting in high cost.

In the method using a conductive deformed material,
Pre-punching and crushing are not required, and the mold can be manufactured only by molding, thereby reducing the cost of the mold. However, since the forming of the deformed material requires time and effort, the material cost is high.

Further, in the method of pressing by combining conductive flat plates having a thickness of a thin plate portion, a right-angle bending process is required, so that the contact shape is easily restricted and the cost of the mold increases. There is a disadvantage of doing so.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and its technical problem is that it is possible to reduce the material cost and the cost of the mold, and to easily carry out the restriction on the shape. It is an object of the present invention to provide a method for producing a conductive thin material.

[0014]

According to the present invention, a substantially flat outer shape of a portion to be processed having a cross-sectional shape having a base material thickness and a predetermined width thickness with respect to a conductive flat material which is a base material having a desired thickness. An outer shape punching step in which punching is performed so as to obtain a pressure-processed portion by compressing both side surfaces in the width direction of the pressure-processed portion that is a local portion of the processed portion along the width direction. A side pressure working step of roughly deforming, and a short thickness and a predetermined width having a cross-sectional shape larger than the base material thickness by leveling and compressing both surfaces of the pressure-processed portion in the base material thickness direction along the base material thickness direction. A method of manufacturing a conductive thin material including a smoothing step of finely deforming the pressure-processed portion so as to form a thinner and thicker to obtain a conductive thin material main body is obtained.

Further, according to the present invention, there is provided a method for manufacturing a contact to which the above-described method for manufacturing a conductive thin material is applied, wherein the conductive thin material main body is a contact main body, and the contact main body is connected to a mating connector. A contact formed integrally with a contact terminal portion extending in a uniaxial direction to be fitted into and provided with a mating contact provided therein and a pressure contact terminal portion incorporated in an insulator of a required connector and connected to the mating conductive connection portion. Is obtained.

[0016]

EXAMPLES The method for producing a conductive thin material of the present invention will be described below in detail with reference to the drawings.

First, the outline of the method for producing a conductive thin material of the present invention will be briefly described. The method of manufacturing the conductive thin material is such that the cross-sectional shape of the conductive flat material, which is a base material having a desired thickness, is substantially the outer shape of a portion to be processed having a base material thickness and a predetermined width thickness. An outer shape punching step for punching, and a side pressure processing step for roughly deforming the pressure-processed portion by compressing both side surfaces in the width direction of the pressure-processed portion, which is a local part of the processed portion, along the width direction. By pressing and compressing both surfaces in the base material thickness direction of the pressure-processed portion along the base material thickness direction, the cross-sectional shape becomes a short thickness larger than the base material thickness and a long thickness smaller than the predetermined width thickness. Then, the pressure-processed portion is slightly deformed to obtain a conductive thin-walled material main body. Incidentally, the lateral pressure processing for roughly deforming the pressure-processed portion and the smoothing processing for fine deformation belong to the rolling processing, respectively.

Incidentally, when the conductive thin material body is manufactured as a contact body, the contact body is fitted in a mating contact provided on the mating connector, and is extended in a uniaxial direction, and The press-connecting terminal portion that is incorporated in the insulator of the required connector and is connected to the mating conductive connecting portion is integrally formed.

FIG. 1 is a view for explaining a contact body obtained by performing the above-described manufacturing method using a conductive flat material as a base material. FIG. FIG. 4B relates to a plan view, and FIG. 5B relates to a side view thereof.

Here, a state is shown in which a plurality of contact bodies 10 having a longitudinal dimension W _L are formed by integrally forming a contact terminal portion 1 and a press contact terminal portion 2 with a pitch width W _P on a flat material having a width W. I have. Here, the contact body 10 thickness of the processing unit other than the pressure processing unit has a base material thickness t, the pressure processing unit of the predetermined that short thicknesses t _S and the aforementioned thicker than HahazaiAtsu t The length t _L is smaller than the width t _OL . The dimensions of each part here are, for example, W = 18.4 m
m, W _P = 2.54 mm, W _L = 13.9 mm, t =
0.3 mm, t _OL = 0.8 mm, t _S = 0.4 mm, t
_L = 0.6 mm.

In the manufacturing process for such a contact body 10, rolling is performed after the outer shape punching process.
A rolled portion is provided via a stopper 13 in a die having an upper die 11 and a lower die 12 as shown in FIG. 2 and a supporting portion for the base as a base, and a processed portion cut out of a base material by the rolled portion. Is rolled. The rolling section is composed of a combination of a pair of rolling tools 14a and 14b provided with a driving punch 16 for rolling and a spring enclosing section 15 for return, and a combination of a leveling punch and a leveling die (not shown).

[0022] In the rolling section as an enlarged view of a region E in FIG. 2 in FIG. 3, a pair of rolling tools 14a, and to be pressure-processed portion of the sample N _B are sequentially positioned as the machined portion between 14b rolling drive punch 16 performs a rolling process by which cooperate to obtain the sample N _a after rolling by rough deformed to be pressure processing unit. The rolling unit is before rolling is in the state shown in FIG. 3, as is shown in Figure 4 when performing rolling, by moving the rolling drive punch 16 in the downward direction M _D indicated by arrows pair To the rolling tools 14a and 14b.
Other downward M _D of the rolling drive punch 16 as the in rolling shown in FIG. 5, a pair of rolling tools 14a, 14
b slightly upward right direction M indicated by arrows
_R, slightly upward movement of the left M _L is pressed against the pressure processing unit. In the above-described side pressure working at the side pressure working stage, rolling is performed in this manner.

On the other hand, in the subsequent smoothing process in the smoothing stage, rolling is performed by sandwiching the portion to be pressed in the vertical direction by using a rolling portion in which a smoothing punch and a smoothing die are combined.

Therefore, the steps of manufacturing the contact of the present invention will be specifically described below. As shown in FIG. 6 (a), in the first outer shape punching step, a flat material as a base material having a desired thickness is formed by the preliminary stage punching tool 3 as shown in FIG. 6 (b).
As shown in the figure, the cross-sectional shape has a base material thickness t and a predetermined width thickness t.
Punching is performed so as to obtain a substantially external shape of the processed portion having _OL . Incidentally, the thickness of the portion processed at this time is shown in FIG.
As shown in the side view of the local portion of the flat material shown in FIG.
Is kept.

At the next side pressure working stage, as shown in FIG. 7 (a), a pair of rolling tools 14 of the above-mentioned die rolling section (the rolling drive punch 16 is not shown).
a, is positioned to be press processing of the sample N _B between 14b, FIG. 7
Each rolling tool 1 according to the pressing direction P shown in FIG.
4a and 14b are moved to compress both sides in the width direction of the pressure-processed portion along the width direction to roughly deform the pressure-processed portion.
As a result, as shown in FIG. 7C, the long thickness t _ML (for example, t _ML = 0.54 mm) and the short thickness t _MS (for example, t _MS =
Samples N _M coarse deformed intermediate state 0.45 mm) is obtained.

Furthermore, the break processing stage, as shown in FIG. 8 (a), to be pressure-processed portion of the sample N _M between the punch 17 and the leveling die 18 Shi become a rolling unit of the above-mentioned mold 8B, the leveling punch 17 and the leveling die 18 are moved in accordance with the pressing direction P shown in FIG. 8B to level both surfaces of the pressure-processed portion in the base material thickness direction along the base material thickness direction. It compresses and slightly deforms the pressure-processed portion. As a result, FIG.
As shown in (c), a sample N _{A of a} pressure-processed portion that becomes a contact body having a short thickness t _S having a cross-sectional shape larger than the base material thickness t and a long thickness t _L smaller than a predetermined width t _OL. Is obtained.

9 (a) to 9 (c) show the cross-sectional shapes of the sample in each process, respectively. FIG. 9 (a) shows the outline punching stage, and FIG.
FIG. 9B shows a cross-sectional shape as shown in FIG.

According to such a manufacturing process, FIG.
FIG. 10 shows a flat material having a base material thickness t as shown in FIG.
Contact body 10 comprising a short thickness t _S (t _S> t) of the thickness increasing portion state N is deformed to such as shown in (b) is obtained.

In the embodiment, FIG. 10B or FIG.
The case where the contact body 10 having the shape as shown in FIG. 11B is manufactured has been described. However, when the present invention is applied, the contact body having the shape as shown in FIG. 10 'can be manufactured as having a base material thickness t and a thickened portion having a thickness t' larger than that. With respect to this point, as shown in FIG. 11B, in the related art, as shown in FIG.
> T) is obtained to form the contact body 10 ′. However, in the case of the contact body 10 ′ manufactured through the crushing process, a crack (crack) occurs when a portion hardened by the crushing is bent. The contact body 10 manufactured according to the present invention has disadvantages such as
'Does not cause such a problem.

[0030]

As described above, according to the present invention, the cross-sectional shape of the conductive flat material, which is the base material having the desired thickness, is equal to the base material thickness and the predetermined thickness in the initial outer shape cutting step. Punching is performed so as to obtain a substantially outer shape of the processed portion having a width, and both side surfaces in the width direction of the pressure processed portion, which is a local part of the processed portion, in the middle side pressure processing stage, along the width direction. After the pressure-processed portion is roughly deformed by compressing, both surfaces in the base material thickness direction of the pressure-processed portion are flattened along the base material thickness direction in a later leveling process, and the cross-sectional shape is reduced. The pressure-processed portion is finely deformed so as to have a short thickness larger than the material thickness and a long thickness smaller than a predetermined width, thereby obtaining a conductive thin material main body. As a result, when manufacturing a contact body that is representative of a conductive thin-walled material body, a thicker base material is coined to form a partially thin portion as in the conventional method, or formed using a deformed material. There is no need to perform processing or press processing by combining flat plates with the thickness of the thin plate part,
Moreover, since a right-angle bending process in the press die is not required, as a result, it is possible to reduce the material cost and the die cost, and to realize a simple and high-quality method for manufacturing a high-quality contact that can eliminate restrictions on the shape. Will be done.

[Brief description of the drawings]

FIG. 1 shows an example of a contact body obtained by carrying out a method for producing a conductive thin material of the present invention using a conductive flat material as a base material, wherein (a) is a plan view of a local portion of a flat material. (B) relates to the side view.

FIG. 2 is a side view showing a metal mold provided with a rolled portion required for rolling after outer shape punching in the method for manufacturing a contact according to the present invention.

FIG. 3 is an enlarged view of a rolled portion in a region E of the mold shown in FIG. 2;

FIG. 4 shows an initial state at the time of rolling by the rolling section shown in FIG. 3;

FIG. 5 shows a state during rolling by the rolling section shown in FIG. 3;

FIG. 6 is a view for explaining an outer shape punching step which is an initial step of a contact manufacturing process of the present invention,
(A) relates to a plan view of a local portion of the flat material, (b) relates to a cross-sectional view in the direction of arrows AA 'in (a), and (c) relates to a side view of the local portion of the flat material.

7A and 7B are views for explaining a side pressure working step which is a middle stage of a manufacturing process of the contact of the present invention, and FIG.
Is a partial cross-sectional view showing the relationship between the rolled portion and the sample before the pressing force, (b) is a partial cross-sectional view showing the relationship between the rolled portion and the sample during the pressing force, and (c) is the sample after the pressing force FIG.

FIG. 8 is a view for explaining a leveling step which is a later stage of a manufacturing process of the contact of the present invention,
(A) relates to a partial cross-sectional view showing the relationship between the rolling section and the sample before the pressing force, (b) relates to a partial cross-sectional view showing the relationship between the rolling section and the sample during the pressing force, and (c) shows the pressing force It relates to a cross-sectional view showing a later sample.

FIG. 9 is a view for explaining a cross-sectional shape of a sample in each step of a contact manufacturing process of the present invention.
(A) relates to the outline cutting step, (b) relates to the lateral pressure step, and (c) relates to the leveling step.

FIGS. 10A and 10B are views for explaining a shape change after each step shown in FIGS. 6 to 8, wherein FIG. 10A is related to a side view of a flat member, and FIG. FIG.

11A and 11B show another contact body that can be formed according to the method for manufacturing a conductive thin material of the present invention, wherein FIG. 11A is an external view including dimensions thereof, and FIG. The present invention relates to an external view including a reduction unit when manufacturing by technology.

12A and 12B show a conventional contact having a partially different thickness, wherein FIG. 12A is related to a plan view thereof, and FIG.
Is related to the side view.

13A and 13B are views for explaining a preliminary punching process when manufacturing a contact body as shown in FIG. 12 using a conductive flat material as a base material, and FIG. 13A is a plan view of a local portion of the flat material; (B) relates to the side view.

14A and 14B are views for explaining a crushing process performed after the preliminary punching process shown in FIG. 13, in which FIG. 14A is related to a plan view of a local portion of a flat material, and FIG. 14B is related to a side view thereof. Things.

15A and 15B are views for explaining a forming and punching process performed after the crushing process shown in FIG. 14, wherein FIG. 15A is related to a plan view of a local portion of a flat material, and FIG. 15B is related to a side view thereof. Things.

FIGS. 16A and 16B are views for explaining a shape change after each step shown in FIGS. 13 to 15, wherein FIG. 16A is related to a side view of a flat material, and FIG. FIG.

17A and 17B are views for explaining a forming process when manufacturing a contact body as shown in FIG. 12 using a conductive deformed material as a base material, and FIG. 17A is a plan view of a local material portion , (B) relate to the side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact terminal part 2 Press-contact terminal part 3 Preliminary stage punching tool 3 'Molding stage punching tool 10, 10' Contact body 11 Upper die 12 Lower die 13 Stopper 14a, 14b Rolling tool 15 Return spring enclosing part 16 Rolling Driving punch 17 Normalizing punch 18 Normalizing die

Claims (2)

(57) [Claims] 1. An outer shape puncher for punching a conductive flat material, which is a base material having a desired thickness, so as to obtain a substantially outer shape of a portion to be processed having a cross-sectional shape having a base material thickness and a predetermined width thickness. A working step, and a side pressure working step of roughly deforming the pressed part by compressing both side surfaces in the width direction of the pressed part which is a local part of the processed part along the thickness direction, By pressing and compressing both surfaces of the pressure-processed portion in the base material thickness direction along the base material thickness direction, the cross-sectional shape is reduced to a short thickness larger than the base material thickness and a long thickness smaller than the predetermined width thickness. A step of finely deforming the pressure-processed portion so as to obtain a conductive thin material main body. 2. A method for manufacturing a contact, to which the method for manufacturing a conductive thin material according to claim 1 is applied, wherein the conductive thin material main body is a contact main body, and the contact main body is provided in a mating connector. A contact terminal portion extending in a uniaxial direction to be fitted into the mating contact and a press contact terminal portion incorporated in the insulator of the required connector and connected to the mating conductive connection portion. A method for manufacturing a contact, comprising: